690340123765 has 8 divisors (see below), whose sum is σ = 828412814520. Its totient is φ = 552268988352.

The previous prime is 690340123763. The next prime is 690340123799. The reversal of 690340123765 is 567321043096.

It can be written as a sum of positive squares in 4 ways, for example, as 1064912689 + 689275211076 = 32633^2 + 830226^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 690340123765 - 2¹ = 690340123763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690340123763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1119691 + ... + 1623079.

It is an arithmetic number, because the mean of its divisors is an integer number (103551601815).

Almost surely, 2^690340123765 is an apocalyptic number.

It is an amenable number.

690340123765 is a deficient number, since it is larger than the sum of its proper divisors (138072690755).

690340123765 is a wasteful number, since it uses less digits than its factorization.

690340123765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777671.

The product of its (nonzero) digits is 816480, while the sum is 46.

The spelling of 690340123765 in words is "six hundred ninety billion, three hundred forty million, one hundred twenty-three thousand, seven hundred sixty-five".